** Summary changed:
- [SRU][OEM-5.14/OEM-5.17][PATCH 0/1] Fix oled brightness set above
frame-average luminance on AMD
+ [SRU][OEM-5.14/OEM-5.17][PATCH 0/1] Fix oled brightness set above
frame-average luminance
** Summary changed:
- [SRU][OEM-5.14/OEM-5.17][PATCH 0/1] Fix oled brightness set above
frame-average luminance
+ [SRU][J/OEM-5.17][PATCH 0/1] Fix oled brightness set above frame-average
luminance
** Changed in: linux-oem-5.14 (Ubuntu Jammy)
Status: Invalid => In Progress
** Changed in: linux-oem-5.17 (Ubuntu Jammy)
Status: Fix Released => In Progress
** Description changed:
[Impact]
- The brightness is not changed obviously during 200 to 255.
+ The brightness is not changed obviously during 200 to 255 on AMD
+ or 400 to 512 on Intel..
[Fix]
+ Read HDR meta to detect the max and min luminance.
max_cll defines the content light luminance for individual pixel.
max_fall defines frame-average level luminance.
Use max_fall value instead of max_cll as a limit for brightness control.
[Test]
- Verified on AMD Cezanne, Barcelo and Rembrandt, also on LCD panel and
- OLED panel. The brightness is changed more obivously on OLED panel, and
+ Verified on AMD Cezanne, Barcelo, Rembrandt and Intel ADL, also on LCD panel
and OLED panel. The brightness is changed more obivously on OLED panel, and
no affect on LCD panel.
[Where problems could occur]
Low risk, It may cause the max brightness can't be set.
- Due to the schedule of OEM project, SRU this patch as SAUCE in OEM
- kernels only.
+ All 3 patches are in drm-misc tree.
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https://bugs.launchpad.net/bugs/1978986
Title:
[SRU][J/OEM-5.17][PATCH 0/1] Fix oled brightness set above frame-
average luminance
Status in HWE Next:
Confirmed
Status in linux package in Ubuntu:
Confirmed
Status in linux-oem-5.14 package in Ubuntu:
Invalid
Status in linux-oem-5.17 package in Ubuntu:
Invalid
Status in linux-oem-5.14 source package in Focal:
Fix Released
Status in linux source package in Jammy:
Confirmed
Status in linux-oem-5.14 source package in Jammy:
In Progress
Status in linux-oem-5.17 source package in Jammy:
In Progress
Bug description:
[Impact]
The brightness is not changed obviously during 200 to 255 on AMD
or 400 to 512 on Intel..
[Fix]
Read HDR meta to detect the max and min luminance.
max_cll defines the content light luminance for individual pixel.
max_fall defines frame-average level luminance.
Use max_fall value instead of max_cll as a limit for brightness control.
[Test]
Verified on AMD Cezanne, Barcelo, Rembrandt and Intel ADL, also on LCD panel
and OLED panel. The brightness is changed more obivously on OLED panel, and
no affect on LCD panel.
[Where problems could occur]
Low risk, It may cause the max brightness can't be set.
All 3 patches are in drm-misc tree.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1978986/+subscriptions
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